unit sphere bundle造句

例句与造句

1. A "'sphere bundle "'is a fiber bundle whose fiber is an metric ( such as the tangent bundle to a Riemannian manifold ) one can construct the associated "'unit sphere bundle "', for which the fiber over a point " x " is the set of all unit vectors in " E " " x ".
2. It's difficult to find unit sphere bundle in a sentence. 用unit sphere bundle造句挺难的